What is best illustrated in this map? a)the silk roads b)the travels of Marco Polo c)the exploration of Vasco De Gama d)the invasion of China by the phoenecians

d)the invasion of China by the phoenecians

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

a. factors that are used to make goods and services